Air exhaust for filling machines



Nov. 10 -1925. v 1,561,032.

c. 1'. SMALL AIR EXHAUST FOR FILLING MACHINES Original Filed Sept. 27, 1920 I Fig.1;

' A RNEY QHESLEY T. SMALL, OF ST. LOUIS, MISSOURI.

AIR EXHAUST FOR FILLING MACHINES.

Application filed September 27, 1920, Serial No. 413,188.

To all whom it may concern:

Be it known that 1, Grammar citizen of the United States of siding at the city of St. Louis,

T. SMALL, a America, re- State of Misa souri, United States of America, have in vented a certain new and useful Air Exhaust for Filling Machines, of which the following is such a full, clear, and exact descrip tion as will enable any one skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to an air exhaustfor filling machines and is particularly adapted for use in connection with filling machines of the class shown and described in application No. 184,990, filed by me August 8, 1917.

In filling machines of the class referred to, some dificulty has been encountered in securing uniform weight of certain classes of material, owing to the fact that the receptacle being filled is in communication with the air exhaust only at the ends of the supply chamber. The object of the present invention is to provide simple and effective means for securing communication between the receptacle and the exhaust at intermediate points during its passage under the supply chamber, and preferably, throughout its entire passage thereunder, and at the same time to present the minimum amount of obstruction to the flow of material through the chamber.

In the accompanying drawings which illustrate one form of device made in accordance with my invention, Fig. 1 is a top plan view on a reduced scale. Fig. 2 is a section taken on the line 22 of Fig. 1. Fig. 3 is a section taken on the line 33 of Fig. 1, and Fig. 41- is a section taken on the line 44: of Fig. 1.

5 indicates a rotating member preferably provided with a wear plate 6. The mem her 5 is also provided with one or more nozzles 7 forming discharge aperture through which the powdered or other material is fed into the receptacle to be filled. 8 is a stationary plate bearing on the wear plate 6 and carrying the supply chamber 9. 10 are passages leading from the ends of the supply chamber 9 to the exhaust pipes 11. The pipes 11 are provided with regulating valves 12. Arranged within the supply chamber 9 are agitators 13 driven by gear Renewed April 22, 1825.

wheels 14. All of the above parts are similar to those shown and described in my application above referred to. I

Arranged adjacent to the outer wall of the supply chamber 9 is an air conduit 15 formed of a sheet of metal 16 secured in position by spacing blocks 1'2" and bolts or rivets 18. This air conduit 15 is converglng inform as best shown in Fig. 2 of the drawing so as to present the least possible obstruction to material passing through the supply chamber and it is open at its bottom so as to communicate with the nozzle 7 during its entire passage under the supply chamber. The conduit 15 communicates with the passages 10 by urea of cross conduits 19 formed of sheets of metal 20 each secured at one end to the sheet 16 and at the other to the inner wall of the supply chamber by means of a flange 21 and bolts or rivets 22. Arranged between each pair of agitators 13 is a cross conduit 23 formed of sheets of metal 2& attached at one end to the sheet 16 and at the other to the inner wall of the supply chamber by means of flange and bolts or rivets 26. These cross conduits 23 like the conduit 15 and 19 are GOIl'VGlglllg or V shaped so as to present but little resistance to the passage of the material through the supply chamber.

It will be evident that by means of my construction the receptacle to be filled is maintained in communication with the e2chaust pipes 11 during its entire passage under the supply chamber and consequently trapping of air in the receptacle is eflectively prevented and uniformity of bulk insured. Furthermore owing to the shape of the conduit the minimum of obstruction 0pposes the flow of material through the sup ply chamber.

Having fully described my invention what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a device of the class described, the combination with a rotary member having a discharge aperture, of a supply chamber arranged above said rotary member for feeding material to a receptacle through the discharge aperture, agitating means in said supply chamber, an airconduit extending along the wall of said supply chamber and opening below said agitating means, and an open bottom conduit communicating with and extending laterally from said first named conduit.

2. in a device of the class described, the combination with a rotary member having a discharge aperture, of a supply chamber arranged above said rotary member and provided with a pair of agitators, an air conduit extending along the Wall of said charging member, and an open bottom conduit communicating With and extending lateraily from said first named conduit and arranged between said agitators. 1

In testimony whereof, I have hereunto set ny hand and aifixed my seal.

OHE SLEY T. SMALL. [1,. s] 

